Mr Mott, who has 24 years experience in the heritage sector, says some insider tips could help restoration projects avoid common pitfalls.

The first step is to find a planning lawyer, who will have expertise in the application process and the planning authority.

"On more complicated projects, particularly if they are within conservation areas, the first port of call ought to be a planning lawyer, who will understand the local authority and be able to advise as to what the most likely scenario is," Mr Mott said.

"Planning lawyers are quite difficult to come across but they are specialists.

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"We also always recommend an independent survey. There's a big difference between the bank surveyors for mortgages and independent listed building surveyors. They don't cost a fortune - typically £750 plus VAT for a two to three bedroom terrace.

"Mortgage companies are looking at what the house is worth whereas these surveys are very detailed.

"You would then get a 20-page report and it would include a brief summary of costs. It's really very revealing. It is very important to find out what you are going to be in for."

Mr Mott, who founded ProjectBook, a vetted register of craftsmen and contractors, said it was a common mistake to think listed building consent applied only to the outside of the property. It applies to the whole structure.

Another subject often overlooked is conservation areas, which can include rules known as Article 4 directions that restrict changes to doors, windows and railings and other features within a designated area.

And when it comes to funding, reduced VAT rates may apply to alterations to a building but full VAT rates can be added to repairs.

"Obviously, doing these things is a labour of love," Mr Mott added. "It's about Britain's long love affair with the past and I think people see it as a challenge."